<?php
//TODO: set your API key found in http://wyday.com/limelm/settings/
$api_key = 'PASTE THE API KEY HERE';

//TODO: set the version id to generate & find keys for
// the version id is found in the url. For example http://wyday.com/limelm/version/100/
// the version id is 100.
$version_id = '100';

date_default_timezone_set('America/Toronto');

function urlEncodePostData($post_data)
{
    $post_string = '';
    foreach ($post_data as $key => $value)
    {
        if (is_array($value))
        {
            foreach ($value as $sub_value)
            {
                $post_string .= $key.'[]='.urlencode($sub_value).'&';
            }
        }
        else
            $post_string .= $key.'='.urlencode($value).'&';
    }
    $post_string = rtrim($post_string, '& ');

    $request = curl_init('https://wyday.com/limelm/api/rest/');
    curl_setopt($request, CURLOPT_HEADER, 0);
    curl_setopt($request, CURLOPT_ENCODING, "");
    curl_setopt($request, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($request, CURLOPT_POSTFIELDS, $post_string);
    curl_setopt($request, CURLOPT_SSL_VERIFYPEER, TRUE);
    return $request;
}

function getProductKeyDetails($post_data)
{
    $request = urlEncodePostData($post_data);

    $jObj = json_decode(curl_exec($request));

    if ($jObj->stat == 'ok')
    {
        foreach ($jObj->pkeys->pkey as $pkey)
        {
            return array
            (
                'key' => $pkey->key,
                'id' => $pkey->id
            );
        }
    }
    else
    {
        // Uncomment the next line to see the error LimeLM is giving you.
        //echo $jObj->message;
    }
    return null;
}

function getProductKeyExpiry($post_data)
{
    $request = urlEncodePostData($post_data);
    $jObj = json_decode(curl_exec($request));

    if ($jObj->stat == 'ok')
    {
        foreach ($jObj->pkey->features->feature as $feature)
        {
            if($feature->name == 'subscription_expiry')
                return $feature->value;
        }
    }
    else
    {
        // Uncomment the next line to see the error LimeLM is giving you.
        //echo $jObj->message;
    }
    return null;
}

function setProductKeyDetails($post_data)
{
    $request = urlEncodePostData($post_data);
    $jObj = json_decode(curl_exec($request));

    if ($jObj->stat !== 'ok')
    {
        // Uncomment the next line to see the error LimeLM is giving you.
        //echo $jObj->message;
    }
}

try
{
    $post_data = array(
        'method' => 'limelm.pkey.advancedSearch',
        'api_key' => $api_key,
        'version_id' => $version_id,
        'email' => $email,
        'feature_name' => array('fastspring_subscription_id'),
        'feature_value' => array($reference),
        'feature_match' => array('exact'),
        'nojsoncallback' => 1,
        'format' => 'json'
    );
    $product_key_details = getProductKeyDetails($post_data);

    if($product_key_details !== null)
    {
        $product_key = $product_key_details['key'];
        $product_key_id = $product_key_details['id'];

        $post_data = array(
            'method' => 'limelm.pkey.getDetails',
            'api_key' => $api_key,
            'pkey_id' => $product_key_id,
            'nojsoncallback' => 1,
            'format' => 'json'
        );
        $product_key_expiry = getProductKeyExpiry($post_data);
        $current_date_time = date('Y-m-d H:i:s', time());

        if($current_date_time > $product_key_expiry)
        {
            $new_product_key_expiry = date('Y-m-d H:i:s', strtotime($current_date_time . '+1 year'));
        }
        else
        {
            $new_product_key_expiry = date('Y-m-d H:i:s', strtotime($product_key_expiry . '+1 year'));
        }

        $post_data = array(
            'method' => 'limelm.pkey.setDetails',
            'api_key' => $api_key,
            'pkey_id' => $product_key_id,
            'feature_name' => array('subscription_expiry'),
            'feature_value' => array($new_product_key_expiry),
            'nojsoncallback' => 1,
            'format' => 'json'
        );
        setProductKeyDetails($post_data);
        echo $product_key . "\r\n";
    }
}
catch (Exception $e)
{
    // Uncomment the next line to see the exception.
    //echo 'Failure: '.$e->getMessage();
}
?>